First commute on the Gryphon this morning, and the main word that comes to mind is SMOOOOOOOOOTH.
Between the Marathon Supremes, the frame, the best riding position I've had in recent memory, and the Nuvinci, I felt like I was riding on a satin sheet the whole way into work this morning.

First impressions of the Nuvinci: Quiet and smooth. The feel at the twist shifter is a little stiff, but not bad. I think I need to fine tune the cable tension to eliminate the small amount of play that I detected when transitioning from upshifting to downshifting.
The hub interface is really simple to disconnect for rear wheel removal, though <knock on wood> I'm not wishing for a flat or anything
I could not detect any noticeable "resistance" in the hub - again it felt very smooth, and I was able to maintain a comfortable spin - no sensation of grinding or vibration.

This is the first time that I have inverted my Jones Loop bar, and I think I prefer it this way. It just suits me better and feels more ergonomic than the normal way.

I'm REALLY glad I went with the 80mm stem instead of the 120mm. My body position feels very good. I used some recommended dimensions for saddle-BB, saddle setback, reach, saddle-handlebar drop (0 in this case to center of stem) and think it is pretty close to my ideal for commuting and general riding.

The rack mounts are pretty far back on the dropouts, and the MTB-dimensioned chain stays are longer than a typical road/cross bike, so the rack is mounted about 50cm farther back than I've had it before. Needless to say, heel clearance is NOT an issue, even with the rather bulky Ortlieb Backrollers that I loaded this morning. I had loaded some supplies/food into the panniers (in addition to my normal assortment of clothing/tools/etc), so the panniers were about 30 pounds total.
The bike handled surprisingly well, despite the load being so far back. I eyeballed it and the centerline of the panniers was somewhat behind the rear axle, but not far.
The balance felt really good - not "waggy" on the out-of-saddle efforts. I also tested the "no hands" tracking and it passed with flying colors.

Handling is very good. I'd read reports from folks who said that the Gryphon begs you to "rail the turns" on singletrack, and I can see why. I had fun testing out the handling on my otherwise mundane urban route.

I'll keep posting back here as the miles pass with ongoing impressions of the frame and the Nuvinci - raves, rants, and everything in between.